Exhaust device for plastic product processing mold

Abstract

The utility model relates to the technical field of plastic product processing, disclose a plastic product processing mould exhaust device, including the upper die, the inside fixedly connected with the support cylinder of upper die, the inside slide connection of support cylinder has the limit stop, the inside fixedly connected with the exhaust pipe of support cylinder, the outer wall slide connection of limit stop is at the outer wall of exhaust pipe, the upper surface fixedly connected with first spring and handle of limit stop, the outer wall slide connection of first spring is at the inner wall of exhaust pipe, the outer wall slide connection of first spring is at the outer wall of handle. In the utility model, when the air pressure reaches certain intensity, and then will push the limit stop and slide in the support cylinder, also can pull the handle and drive the limit stop and slide in the support cylinder, when the limit stop slides through the exhaust pipe, the gas produced will be discharged through the exhaust pipe, and then can carry out the exhaust treatment, and then reached the flexible exhaust effect, thereby the appearance and performance quality of injection molding part are improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic product processing technology, and in particular to an exhaust device for plastic product processing molds. Background Technology

[0002] In the field of plastic product processing, injection molding is a widely used processing method. However, gas management inside the mold becomes a crucial aspect during the injection molding process. These gases mainly originate from air present in the mold cavity and gating system, as well as volatile gases generated by the decomposition or chemical reaction of plastic raw materials at high temperatures. To improve production efficiency, a venting device for plastic product processing molds is therefore needed.

[0003] A venting device for plastic product processing molds is a structure specifically designed to expel gases trapped inside the mold during molding. However, traditional venting devices have many drawbacks and cannot meet the demands of the modern plastic product processing industry for high quality, high efficiency, and low cost. In particular, traditional venting devices are usually designed for specific molds and injection molding processes, making it difficult to adapt to the needs of different plastic materials, different injection molding parameters, and different mold structures, thus lacking flexibility. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a venting device for plastic product processing molds, which aims to improve the problem that traditional venting devices are usually designed for specific molds and injection molding processes, thus lacking flexibility.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A venting device for plastic product processing molds includes an upper mold, a support cylinder fixedly connected inside the upper mold, a limit block slidably connected inside the support cylinder, an vent pipe fixedly connected inside the support cylinder, the outer wall of the limit block slidably connected to the outer wall of the vent pipe, a first spring and a handle fixedly connected to the upper surface of the limit block, the outer wall of the first spring slidably connected to the inner wall of the vent pipe, the outer wall of the first spring slidably connected to the outer wall of the handle, the outer wall of the handle slidably connected to the inside of the support cylinder, and a support assembly provided on the outer wall of the upper mold.

[0007] Preferably, the support assembly includes a lower mold, the outer wall of the lower mold is in contact with the outer wall of the upper mold, a support platform is fixedly connected to the lower surface of the lower mold, and a base plate is fixedly connected to the outer wall of the support platform.

[0008] Preferably, a support frame is fixedly connected to the upper surface of the base plate, and a limit frame is fixedly connected to the inner top wall of the support frame.

[0009] Preferably, a hydraulic cylinder is fixedly connected inside the limiting frame, and a connecting block is fixedly connected to the output end of the hydraulic cylinder.

[0010] Preferably, the connecting block is slidably connected to a slide rail, and the outer wall of the slide rail is fixedly connected to the outer wall of the limiting frame.

[0011] Preferably, a pulley is rotatably connected to the outer wall of the connecting block, a U-shaped block is rotatably connected to the outer wall of the pulley, and a support column is fixedly connected to the outer wall of the U-shaped block.

[0012] Preferably, the outer wall of the support column is slidably connected to the inside of the limiting frame, and a second spring is slidably connected to the outer wall of the support column. The outer wall of the second spring is fixedly connected to the outer wall of the U-shaped block.

[0013] Preferably, a U-shaped frame is fixedly connected to the bottom end of the support column, the inner wall of the U-shaped frame is fixedly connected to the outer wall of the upper mold, a limit post is slidably connected inside the upper mold, and the top end of the limit post is fixedly connected to the inner top wall of the support frame.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, when the air pressure reaches a certain strength, it will push the limiting block to slide in the support cylinder. At the same time, the handle can be pulled to drive the limiting block to slide in the support cylinder. When the limiting block slides past the exhaust pipe, the generated gas will be discharged through the exhaust pipe, thus achieving the effect of flexible exhaust, thereby improving the appearance and performance quality of the injection molded part.

[0016] 2. In this utility model, the connecting block is pushed to slide on the slide rail by the hydraulic cylinder, and then the pulley is pushed to rotate by the connecting block. Then, the support column is driven to slide in the limit frame by the U-shaped block. At the same time, the second spring is squeezed to retract. Then, the support column drives the upper mold to slide on the limit column through the U-shaped frame, so that the upper mold and the lower mold can be connected, thereby improving the alignment accuracy and reducing defects such as flash and burrs caused by inaccurate mold positioning. Attached Figure Description

[0017] Figure 1 This is a perspective view of the venting device for plastic product processing molds proposed in this utility model;

[0018] Figure 2 This is a partial structural diagram of the limiting column of the venting device for plastic product processing molds proposed in this utility model;

[0019] Figure 3 This is a partial structural diagram of the exhaust pipe of the exhaust device for the plastic product processing mold proposed in this utility model;

[0020] Figure 4This is a partial structural diagram of the U-shaped block of the venting device for plastic product processing molds proposed in this utility model.

[0021] Legend:

[0022] 1. Upper mold; 2. Support cylinder; 3. Limiting block; 4. Exhaust pipe; 5. First spring; 6. Handle; 7. Lower mold; 8. Support platform; 9. Base plate; 10. Support frame; 11. Limiting frame; 12. Hydraulic cylinder; 13. Connecting block; 14. Slide rail; 15. Pulley; 16. U-shaped block; 17. Support column; 18. Second spring; 19. U-shaped frame; 20. Limiting column. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides a venting device for a plastic product processing mold, comprising an upper mold 1, a support cylinder 2 fixedly connected inside the upper mold 1, a limit block 3 slidably connected inside the support cylinder 2, an vent pipe 4 fixedly connected inside the support cylinder 2, the outer wall of the limit block 3 slidably connected to the outer wall of the vent pipe 4, a first spring 5 and a handle 6 fixedly connected to the upper surface of the limit block 3, the outer wall of the first spring 5 slidably connected to the inner wall of the vent pipe 4, the outer wall of the first spring 5 slidably connected to the outer wall of the handle 6, the outer wall of the handle 6 slidably connected to the inside of the support cylinder 2, and a support assembly provided on the outer wall of the upper mold 1.

[0025] Specifically, when the upper mold 1 and the lower mold 7 are connected, the plastic decomposes at high temperature to generate gas. When the gas pressure reaches a certain strength, it will push the limiting block 3 to slide in the support cylinder 2. The support cylinder 2 provides a slide for the limiting block 3 and limits the limiting block 3. The limiting block 3 drives the handle 6 to slide in the support cylinder 2, and also compresses the first spring 5 to make it contract. When the limiting block 3 slides past the exhaust pipe 4, the generated gas will be discharged through the exhaust pipe 4. The inner wall of the exhaust pipe 4 is smooth, which makes it easy to clean later. This allows for the venting of the upper mold 1 and the lower mold 7. At the same time, when the handle 6 is pulled, it also drives the limiting block 3 to slide in the support cylinder 2, and compresses the first spring 5. When the handle 6 is not pulled or there is no pressure difference, the first spring 5 is in its natural state, which allows the limiting block 3 to block the exhaust pipe 4. When the limiting block 3 slides past the exhaust pipe 4, the gas can also be discharged, thus achieving the effect of flexible venting.

[0026] Reference Figure 1 , Figure 2 and Figure 4 The support assembly includes a lower mold 7, the outer wall of which fits against the outer wall of the upper mold 1. A support platform 8 is fixedly connected to the lower surface of the lower mold 7, and a base plate 9 is fixedly connected to the outer wall of the support platform 8. A support frame 10 is fixedly connected to the upper surface of the base plate 9, and a limit frame 11 is fixedly connected to the inner top wall of the support frame 10. A hydraulic cylinder 12 is fixedly connected to the inside of the limit frame 11, and a connecting block 13 is fixedly connected to the output end of the hydraulic cylinder 12. A slide rail 14 is slidably connected to the inside of the connecting block 13, and the outer wall of the slide rail 14 is fixedly connected to the outer wall of the limit frame 11. A pulley 15 is rotatably connected to the outer wall of the connecting block 13, and a U-shaped block 16 is rotatably connected to the outer wall of the pulley 15. A support column 17 is fixedly connected to the outer wall of the U-shaped block 16. The outer wall of the support column 17 is slidably connected to the inside of the limit frame 11, and a second spring 18 is slidably connected to the outer wall of the support column 17. The outer wall of the second spring 18 is fixedly connected to the outer wall of the U-shaped block 16.

[0027] Specifically, the hydraulic cylinder 12 pushes the connecting block 13 to slide on the slide rail 14, where the slide rail 14 limits the connecting block 13, thus effectively preventing the connecting block 13 from shifting during sliding. The connecting block 13 pushes the pulley 15 to rotate, and the pulley 15 drives the support column 17 to slide in the limiting frame 11 through the U-shaped block 16. At the same time, the limiting frame 11 supports and limits the support column 17, thereby compressing the second spring 18 to shrink it. The second spring 18 plays a certain buffering role. The support column 17 drives the upper mold 1 to slide on the limiting column 20 through the U-shaped frame 19, thus allowing the upper mold 1 to dock with the lower mold 7.

[0028] Reference Figure 4 The bottom end of the support column 17 is fixedly connected to a U-shaped frame 19. The inner wall of the U-shaped frame 19 is fixedly connected to the outer wall of the upper mold 1. The upper mold 1 is slidably connected to a limit column 20. The top end of the limit column 20 is fixedly connected to the inner top wall of the support frame 10.

[0029] Specifically, the limiting post 20 supports and limits the upper mold 1, thereby ensuring the stability of the upper mold 1 during the sliding process, and thus enabling the upper mold 1 and the lower mold 7 to be more accurately connected. The U-shaped frame 19 assists in connecting and limiting the upper mold 1.

[0030] Working principle: When this device is needed, firstly, molten plastic is added to the lower mold 7. Then, the hydraulic cylinder 12 is activated, which pushes the connecting block 13 to slide on the slide rail 14. The connecting block 13 pushes the pulley 15 to rotate. The pulley 15 drives the support column 17 to slide in the limiting frame 11 through the U-shaped block 16, thereby compressing the second spring 18 and causing it to contract. The support column 17 drives the upper mold 1 to slide on the limiting column 20 through the U-shaped frame 19, thus allowing the upper mold 1 to dock with the lower mold 7. At this time, the plastic will decompose at high temperature and generate gas. When the gas pressure reaches a certain strength, it will push the limiting block 3 to slide in the support cylinder 2. The limiting block 3 drives the handle 6 to slide in the support cylinder 2, while compressing the first spring 5 and causing it to contract. When the limiting block 3 slides past the exhaust pipe 4, the generated gas will be discharged through the exhaust pipe 4, thus allowing the plastic to be discharged. The upper mold 1 and lower mold 7 are used for venting. At the same time, the handle 6 can be pulled to move the limiting block 3 in the support cylinder 2, while squeezing the first spring 5. After the limiting block 3 slides past the vent pipe 4, the gas can also be discharged. This device not only achieves flexible venting, but also effectively reduces injection pressure, injection time, holding time and mold clamping pressure, making product molding easier and thus improving production efficiency. At the same time, the venting volume can be adjusted according to the actual situation in the injection molding process to avoid various surface defects caused by gas retention, improve the appearance and performance quality of injection molded parts, and also improve the alignment accuracy, thereby reducing defects such as flash and burrs caused by inaccurate mold positioning, further improving the appearance and performance of products. At the same time, it can also ensure that the mold is subjected to uniform force when the mold is closed, reduce mold wear and damage, and extend the service life of the mold.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A venting device for plastic product processing molds, comprising an upper mold (1), characterized in that: The upper mold (1) is fixedly connected to a support cylinder (2), and a limit block (3) is slidably connected inside the support cylinder (2). An exhaust pipe (4) is fixedly connected inside the support cylinder (2). The outer wall of the limit block (3) is slidably connected to the outer wall of the exhaust pipe (4). A first spring (5) and a handle (6) are fixedly connected to the upper surface of the limit block (3). The outer wall of the first spring (5) is slidably connected to the inner wall of the exhaust pipe (4). The outer wall of the first spring (5) is slidably connected to the outer wall of the handle (6). The outer wall of the handle (6) is slidably connected to the inside of the support cylinder (2). A support assembly is provided on the outer wall of the upper mold (1).

2. The venting device for plastic product processing molds according to claim 1, characterized in that: The support assembly includes a lower mold (7), the outer wall of the lower mold (7) is in contact with the outer wall of the upper mold (1), a support platform (8) is fixedly connected to the lower surface of the lower mold (7), and a base plate (9) is fixedly connected to the outer wall of the support platform (8).

3. The venting device for plastic product processing molds according to claim 2, characterized in that: A support frame (10) is fixedly connected to the upper surface of the base plate (9), and a limit frame (11) is fixedly connected to the inner top wall of the support frame (10).

4. The venting device for plastic product processing molds according to claim 3, characterized in that: A hydraulic cylinder (12) is fixedly connected inside the limiting frame (11), and a connecting block (13) is fixedly connected to the output end of the hydraulic cylinder (12).

5. The venting device for plastic product processing molds according to claim 4, characterized in that: The connecting block (13) is internally slidably connected to a slide rail (14), and the outer wall of the slide rail (14) is fixedly connected to the outer wall of the limiting frame (11).

6. The venting device for plastic product processing molds according to claim 5, characterized in that: The outer wall of the connecting block (13) is rotatably connected to a pulley (15), the outer wall of the pulley (15) is rotatably connected to a U-shaped block (16), and the outer wall of the U-shaped block (16) is fixedly connected to a support column (17).

7. The venting device for plastic product processing molds according to claim 6, characterized in that: The outer wall of the support column (17) is slidably connected to the inside of the limiting frame (11), and the outer wall of the support column (17) is slidably connected to a second spring (18), the outer wall of the second spring (18) being fixedly connected to the outer wall of the U-shaped block (16).

8. The venting device for plastic product processing molds according to claim 7, characterized in that: The bottom end of the support column (17) is fixedly connected to a U-shaped frame (19), the inner wall of the U-shaped frame (19) is fixedly connected to the outer wall of the upper mold (1), the upper mold (1) is slidably connected to a limit column (20), and the top end of the limit column (20) is fixedly connected to the inner top wall of the support frame (10).

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